What is the main benefit of using boxed rear lower control arms?

Boxed control arms minimize suspension deflection, which leads to crisper handling and less wheel hop. This means your car will feel more stable and responsive, especially during acceleration or cornering.

Do these control arms come with everything needed for installation?

These control arms come pre-assembled with greaseable polyurethane bushings and zinc-plated sleeves. They also include reinforced sway bar mounting holes with TIG-welded sleeves. You will need basic hand tools for installation, which typically takes about an hour.

Where are these UMI Performance control arms manufactured?

These control arms are manufactured in Philipsburg, PA, USA by UMI Performance.

UMI Performance 73-77 GM A-Body Boxed Rear Lower Control Arms

Specifications

Brand: UMI Performance
Part #: 4215-B
UPC: 4215-B

UMI Performance 73-77 GM A-Body Boxed Rear Lower Control Arms

Name: UMI Performance 73-77 GM A-Body Boxed Rear Lower Control Arms
Brand: UMI Performance
Price: 337.27 USD
Availability: InStock

$337.27

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UMI Performance boxed rear lower control arms for 73-77 GM A-Body. Minimizes deflection for crisp handling and less wheel hop.

Key Features

Fits 1973-1977 GM A-Body vehicles.
Boxed construction from 1/8-inch wall mild steel tubing for strength.
Assembled with greaseable polyurethane bushings and zinc-plated sleeves.
Reinforced sway bar mounting holes with TIG-welded sleeves for factory-style mounting.
CNC machined for accuracy and consistency.
Durable powder coat finish for long-lasting protection.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Will this fit your vehicle?

Product Details

What you get here are a pair of UMI Performance boxed rear lower control arms, designed to stiffen up the rear suspension on your 1973-1977 GM A-Body vehicle. These arms are built to handle everything from daily driving to track days, helping to reduce unwanted suspension movement. By minimizing deflection, you'll notice crisper handling and a significant reduction in wheel hop, especially when you're putting power down.

These control arms are constructed from 1/8-inch wall mild steel tubing and are CNC machined for precise dimensions. They feature MIG-welded heavy-duty bushing holders and come assembled with greaseable polyurethane bushings that include zinc-plated sleeves. A notable feature is the reinforced sway bar mounting holes, which use TIG-welded sleeves to maintain factory-style sway bar placement and height, even with the added strength of these arms. The durable powder coat finish means they'll look good and hold up over time.

Installation is straightforward, typically taking about an hour with basic hand tools. These control arms fit a range of popular vehicles including the Chevrolet El Camino, Oldsmobile Cutlass, and Pontiac LeMans from the specified years. They are made in Philipsburg, PA, USA.